Pressure generation to 65 GPa in a Kawai-type multi-anvil apparatus with tungsten carbide anvils

Takayuki Ishii, Daisuke Yamazaki, Noriyoshi Tsujino, Fang Xu, Zhaodong Liu, Takaaki Kawazoe, Takafumi Yamamoto, Dmitry Druzhbin, Lin Wang, Yuji Higo, Yoshinori Tange, Takashi Yoshino, Tomoo Katsura

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    We have expanded the pressure ranges at room and high temperatures generated in a Kawai-type multi-anvil apparatus (KMA) using tungsten carbide (WC) anvils with a high hardness of Hv = 2700 and a Young’s modulus of 660 GPa. At room temperature, a pressure of 64 GPa, which is the highest pressure generated with KMA using WC anvils in the world, was achieved using 1°-tapered anvils with a 1.5-mm truncation. Pressures of 48–50 GPa were generated at high temperatures of 1600–2000 K, which are also higher than previously achieved. Tapered anvils make wide anvil gaps enabling efficient X-ray diffraction. The present pressure generation technique can be used for studying the upper part of the Earth’s lower mantle down to 1200 km depth without sintered diamond anvils.

    Original languageEnglish
    Pages (from-to)507-515
    Number of pages9
    JournalHigh Pressure Research
    Volume37
    Issue number4
    DOIs
    Publication statusPublished - Oct 2 2017

    Keywords

    • Kawai-type multi-anvil apparatus
    • lower mantle
    • sintered diamond anvil
    • synchrotron
    • tungsten carbide anvil

    ASJC Scopus subject areas

    • Condensed Matter Physics

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